viscous material convergence problem

lightegg · Post by **lightegg** » Sun Apr 26, 2009 12:37 am

Hi! I am modeling a viscous damper with truss element. I use the control scrips for convergence. However, the result seems to be wrong. Small displacement variation can cause big velocity variation, which produce the big damping force. Someone say it's the integral method cause the ploblem. Would you please tell me how to solve this problem, and what is the best integral method(I use newmark) for modeling viscous damper. I know there are many tansient Integral methods which are not mentioned in the User Command-Language Manual.

Post by **fmk** » Mon Apr 27, 2009 10:26 am

post your script if the model is small.

Post by **fmk** » Mon Apr 27, 2009 10:58 am

post your script if the model is small.

lightegg · Post by **lightegg** » Tue May 12, 2009 10:28 pm

Hi! fmk.
I have sent my scripts to fmckenna@berkeley.edu, have you received yet?